Virtual machine thermal migration method, virtual machine thermal migration device and virtual machine thermal migration system

The invention provides a virtual machine live migration method, a virtual machine live migration device and a virtual machine live migration system.The virtual machine live migration method comprises the steps that the dirty page rate and the network bandwidth of each memory block are monitored in real time, a floating threshold value is dynamically adjusted, the memory blocks with the dirty page rate smaller than the floating threshold value are marked to form a first to-be-transmitted memory block table, and the first to-be-transmitted memory block table is sent to the first to-be-transmitted memory block table; marking the memory blocks with dirty page rates greater than or equal to a floating threshold to form a second to-be-transmitted memory block table, and updating the first to-be-transmitted memory block table and the second to-be-transmitted memory block table in real time after the floating threshold is adjusted; in the process, the memory blocks in the first to-be-transmitted memory block table ar